1.Available for all sizes of notebooks 2.Single fan with big size: ∅18cm 3.The elevated function: comfortable for the typing posture 4.Great ventilating effect: scattering the heat of the notebook 5.Be adjusted to different angles 6.Anti-slide blocks prevent notebook from slipping 7.Easy to store 8.4 blue LED lights 9.Other options for LED color: green, white. 1 Pc/Inner Box, 16Box/CTN/1.9.